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30 Cards in this Set
- Front
- Back
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Physical connection and interrelations:
Reactor Cooling System |
Reactor coolant heat is removed from the reactor is transferred to the Main Steam in the Steam Generators. |
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Physical connection and interrelations:
Emergency Feed water |
Emergency Feed water the Main Steam System provides steam for during the EFWT (EFWAB)
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Physical connection and interrelations:
Main Feed water |
Feed water supplies feed water to the Steam Generator to be turned into steam, also controls SG level. Feed water supplies water from the Condensate system to the SG to be turned into steam, and also controls SG level |
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Physical connection and interrelations: Instrument Air |
Instrument Air provides for the operation of all pneumatically operated valves, instruments, and controls
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Physical connection and interrelations: Turbine Generator |
Main Turbine steam is conveyed to the turbine generator where the steams thermal energy is converted to mechanical energy.
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Physical connection and interrelations: Steam Bypass Control |
Steam Bypass main steam over pressure below the safety valves set point is relieved by dumping steam to the condenser
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Physical connection and interrelations: Radiation Monitor |
-Located adjacent to each Main Steam Line as it exits containment (+46 wing area) ARM-5500 -Alarms locally and at CP-36 @ 2mR/hr -Located in the center of +46 wing area -Detectors mounted on each MA line as it exits containment -Alert on RM-11(CP-6) at 5gpd SG tube leakage; Alarm at 30gpd *Action in UNT-005-032, SG Primary to Seconday leakage |
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Physical connection and interrelations: Aux Steam |
Aux Steam is supplied with steam who ever the unit is operating and the Aux boiler is not on the line
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Physical connection and interrelations: Moisture Separator Reheater |
See slide 263 for physical connections
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Physical connection and interrelations: Gland Steam Sealing |
Gland seal when steam pressure is in excess of 200 psig the Main Steam System can supply steam to the gland seal through a seal regulator
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Physical connection and interrelations: Nitrogen Gas |
Nitrogen system supplies the MSIV hydraulic accumulator, MSIV hydraulic unit reservoir blanketing and provides back up to the instrument air system for operating the Atmospheric Dump Valve
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Summarize the Operation and function of the Steam Generator
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-Steam Generator transfers heat from the RCS to the Secondary Coolant -The heat causes the secondary system coolant to boil which produces steam -Steam Generator is designed to transfer 3716 MWth and 23 MW from Reactor Coolant Pumps via RCS, limit moisture to max if .04% |
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Summarize the operations and functions of SG Code Safety Valves
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-Safety relief valves protects the Steam Generator and the Main Steam piping against over pressurization -6 safety valves per SG, set points are 1070, 1085, 1100, 1115, 1125, 1135 -12 valves can pass 100% of steam generated at rated power. |
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Summarize the operations and function of the ADV
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-These valves permit a controlled release of steam provide RCS cooling and Main Steam pressure control whenever MSIV are closed or when the condenser is not available for receiving bypass steam -Each valve can pass 5% flow at rated thermal power -Valve controller on CP-8 is normally set to open the ADV @ 990-992 -Opens and closes with Instrument Air with nitrogen as backup, which is also backed up by essential air. |
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Summarize the operation and function of MSIV
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-MSIV are provided to isolate the SG's from the remaining portion of the secondary system should there be a LOCA or a MSLB -Closes in 4 seconds -MSIS is generated by high containment pressure of 17.1 PSIA or low SG pressure of 666 PSIA -Rapid cooling prevents over cooling of the RCS, aids in mitigating pressurized the shock, and reduce reactor vessel head void formation. |
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Identify the interlocks which provide for MSIS
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Main Steam Isolation Signal is generated by either -High containment pressure (17.1 PSIA) -Low SG's pressure (666 PSIA) |
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Identify the interlocks which provide for a Containment Isolation Actuation Signal |
Containment Isolation Actuation Signals is generated by either -High containment pressure (17.1 PSIA) -Low pressurizer pressure of (1684 PSIA) |
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Summarize the effects of a degradation of the Main Steam system on RCS
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The RCS would rapidly cool down and possibly depressurize |
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Summarize the effects of degradation of the Main Steam system on the Main Turbine Generator
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The Main Turbine Generator would lose load due to lowering steam pressure |
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Summarize the effects of degradation of the Main Steam system on the Turbine Driven Emergency Feed water pump.
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-AB EFW pump turbine will continue to have a steam source from at least SG -On a tube leak the AB EFW turbine may continue to run using steam from the remaining unaffected SG. |
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Summarize the effects of a degradation of the Main Steam system on the Main Feed Water pumps
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Main Feed Water pumps would lose their source of high pressure steam.
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Summarize the effects of degradation of the Main Steam System on ADV's
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The excess steam demand could be caused by failing a ADV open.
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Summarize the effects of a degradation of the Main Steam on the Steam Bypass Control System. |
The excess steam demand could be caused by failing on SBCV
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Summarize the design feature which provide for prevention of reverse steam flow following a steam line break Main Steam Isolation Signal
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NA |
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Review Procedures
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OP-005-004 OP-005-002 OP-005-005 OP-010-003 OP-010-005 OP-500-011 OP-500-012 |
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Interrelations of Emergency Feed water
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-Emergency Feed water supplies water to the steam generator when the Main Feed Water fails. -Also receives main steam for operation of the EMPT (EFWAB) |
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Explain the following terms regarding operations of the SG's Swell |
-Swell is the phenomenon where indicated level (down comer level) rises rapid and further the expected -It occurs when power is suddenly raised a large amount -Causes could be opening of a SBCV, ADV, SG Safety Valves or other actions that suddenly raise steam flow |
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Explain the following terms regarding operations of the SG's Shrink |
-Shrink is the phenomenon where indicated level (down comer level) drops both rapidly and further than expected -It occurs when power is reduced a large amount such as 100% to 50% or on a reactor trip. |
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Explain the following terms regarding operation of the SG's Recirculation Ratio |
A measure if the amout of preheating provided to the incoming feed water by the saturated liquid from the Moisture Separator Drains Recirculation= steam flow + recirculation flow/steam flow |
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The
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End
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